Recently, online games have received much attention due to the big profit-marking. With the development of wireless networks and the mobile phones, the mobile online games also attract many game providers and players. Compared to traditional online games, mobile games can provide the gaming users to play games anytime and anywhere at wish. For example, it is very popular that a game user plays a game when it waits for a bus. However, wireless networks are inherently less secure than wired networks due to the broadcast nature of the wireless environments. Thus, in order to provide fair games, t...
